If x i 's are the midpoints of the class intervals of a grouped data, f i 's are the corresponding frequencies and 7 is the mean then

Question

Philoid · Accepted Answer

If mean = 7, x_i’s = midpoints of the class intervals and f_i = corresponding frequencies

Mean is given by,

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Or

If xi's are the midpoints of the class intervals of a grouped data, fi's are the corresponding frequencies and 7 is the mean then